package com.kfm.validationdemo.service.impl;

import com.kfm.validationdemo.model.User;
import com.kfm.validationdemo.service.UserService;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {
    @Override
    public User login() {
        String str = null;
        System.out.println(str.length());
        return null;
    }
}
